By AGENCE FRANCE PRESSE, Washington, United States, Dec 28 – Instagram said Thursday it accidentally rolled out a design change to a large number of users and quickly ended the test after complaints from users of the Facebook-owned social network.

The redesign required users to swipe horizontally instead of the normal vertical scroll to see their feed, befuddling many members of the photo- and video-sharing application, which has over one billion users worldwide.

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The move ignited complaints on Twitter where the hashtag #InstagramUpdate became a top trending issue.